public class ReferenceCountingGC {
    public Object instance = null;
    private static final int _1MB=1024*1024;

    private byte[] bigSize=new byte[2*_1MB];


    public static void main(String[] args) {
        ReferenceCountingGC objA = new ReferenceCountingGC();
        ReferenceCountingGC objB=new ReferenceCountingGC();
        objA.instance=objB;
        objB.instance=objA;

        objA=null;
        objB=null;

        System.gc();
    }
}
